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Spin hall angle of rhodium and its effects on magnetic damping of Ni80Fe20 in Rh/Ni80Fe20 bilayer
Citation
Mahato, B. K., Medwal, R., Baidya, S., Kumar, D., Piramanayagam, S. N., & Rawat, R. S. (2022). Spin hall angle of rhodium and its effects on magnetic damping of Ni80Fe20 in Rh/Ni80Fe20 bilayer. Journal of Magnetism and Magnetic Materials, 555, Article 169404. https://doi.org/10.1016/j.jmmm.2022.169404
Author
Mahato, Bipul Kumar
β’
Medwal, Rohit
β’
Baidya, S.
β’
Kumar, D.
β’
Piramanayagam, S. N.
β’
Abstract
We report the investigation of the spin Hall angle (SHA) of Rhodium (Rh) and the effective magnetic damping constant of Ni80Fe20 in Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system using Spin Torque Ferromagnetic Resonance (STFMR) spectroscopy and density functional theory based analysis. The filtered DC output voltages from Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system at different input signal frequencies and powers for a complete 360ΒΊ angle were measured. The average magnetic damping constant of Ni80Fe20 is found to be 0.017 and the angle-dependent study shows a 2-fold symmetry with the in-plane anisotropy field of 120 Oe. The SHA of Rh is found to be 0.2 %. The results agrees well with the calculations based on density functional theory where we found spin Hall conductivity (ππ₯π¦π ππππ§) at the charge-neutral Fermi level (EF) is positive and itβs magnitude is ~423(βπ) (S/cm).
Date Issued
2022
Publisher
Elsevier
Journal
Journal of Magnetism and Magnetic Materials
Grant ID
MOE2019-T2-1-058
NRF-CRP21-2018-0003
Funding Agency
Ministry of Education, Singapore
National Research Foundation, Singapore